Windows Vista Ultimate users began to receive the first set of "Ultimate Extras". But arguably the most anticipated Ultimate Extra was not there -- Windows DreamScene.

Windows client director, Jeff Putt has confirmed that this extra will not be available in its final form immediately after launch. However, a technology preview may be coming soon for Windows Vista Ultimate users who want to give it a try.

Windows DreamScene enables users to use looping high-definition video content (MPEG, WMV) as an animated wallpaper. Thanks to the new 3D accelerated desktop in Windows Vista, the animated wallpaper uses virtually no CPU (just a little for decoding the video).

Microsoft demonstrated Windows DreamScene yesterday at the launch event which showed Windows DreamScene using an animated wallpaper created by Stardock. The wallpaper they showed will be available exclusively at Neowin.net's partner site, WinCustomize.com, in February.

More information on public availability for Windows Vista Ultimate users is expected soon.